.dropdown .dt {
    width: 100%;
    height: 100%;
    color: #fff;
    text-indent: 2rem;
    line-height: 45px;
    font-size: 16px;
}
.dropdown:hover .nav_left_menu{
    display: block;
}
.dropdown:hover .nav_left_menu>.menu_box{
    display: block;
}
.nav_left_menu{
    display: none;
    width: 210px;
    height: 465px;
    margin-top: 2px;
    position:absolute;
    z-index: 2;
  
    background: rgba(255,255,255,.9);
    font-size: 12px;
}
.menu_box {
    display: none;
    width: 100%;
    height: 57.5px;
    overflow: hidden;
    box-shadow: inset -20px -7px 7px -15px rgb(0 0 0 / 4%);
}
.menu_box dl {
    display: block;
    width: 182px;
    height: 100%;
    margin: 0 auto;
    box-shadow: inset 0 1px 0 0 rgb(196 142 142 / 10%);
}
.menu_box dl dt a {
    color: #4d4d4d;
    float: left;
    margin-right: 4px;
    font-weight: 700;
    line-height: 57.5px;
    cursor: pointer;
}
.menu_box .rel {
    overflow: hidden;
    width: 100%;
    max-width: 119px;
    height: 57.5px;
    color: #ccc;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.menu_box dl .rel a {
    padding: 0;
    margin-right: 3px;
    line-height: 57.5px;
}
.menu_box:hover{
    background:rgba(255,255,255,.9);
}
.menu_box:hover dd{
    display: block;
}
.sub_menu {
    display: none;
    width: 700px;
    height: 460px;
    background-color: #fff;
    position: absolute;
    top: 0;
    left: 202px;
    box-shadow: 4px 0 8px 0 rgb(0 0 0 / 10%);
}
.sub_menu .brand{
    height: 200px;
}
.sub_menu .brand span{
    position: relative;
    display: block;
    color: #666;
    margin: 40px;
    line-height: 15px;
    padding-left: 7px;
    font-size: 14px;
    font-weight: 700;
}
.hot .hot_txt{
    display: block;
    color: #666;
    margin: 40px;
    line-height: 15px;
    padding-left: 7px;
    font-size: 14px;
    font-weight: 700;
}
.sub_menu .brand ul{
    position: relative;
    width: 712px;
    max-height: 278px;
    margin-bottom: 24px;
    box-sizing: border-box;
    padding: 5px;
  
}
.sub_menu .brand ul li {
    position: relative;
    width: 139px;
    height: 79px;
    overflow: hidden;
    border: 1px solid #e6e6e6;
    box-sizing: border-box;
    margin-left: -1px;
    margin-bottom: px;
}
.sub_menu .brand ul li img{
    margin: 10px;
}
.sub_menu .brand ul li:nth-child(5n) {
    margin-left: 0;
}
.hot a{
    display: inline-block;
    height: 36px;
    line-height: 36px;
    padding: 0 18px;
    border: 1px solid #eee;
    border-radius: 100px;
    font-size: 14px;
    color: #666;
    margin-left: 20px;
}
